| 摘要 |
PURPOSE:To realize the number of the process step and then to reduce the process time by detecting the control signals of different factors in the same step and then deciding the generation factors for the control signal after execution of the detection process. CONSTITUTION:An order is given at the control memory CM1 side to detect whether status IO of data non-detection circuit 11 is ''READING'' or not via control signal line in the same step as that waiting for the carry-out Co signal from the external unit side. As no data is detected in the normal time, IO is delivered to then enter status coincidence circuit 8, OR gate 10, Co terminal, gate G5 and address control circuit ACL2 respectively. And CM1 ends the reading through the prescribed byte counting. In this case, CM1 receives the control again by signal 6 after end of the reading in order to decide the Co is from circuit 8 or data count control circuit 9. Thus, the normal state is decided in case no Co is detected; and all actions are cleared to carry out the reading again in case the Co is detected. |
